This species has a small range, and remaining tracts of its forest habitat are severely fragmented and under great pressure outside protected areas. Its population is therefore suspected to be declining and it is listed as Vulnerable.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.
Bubo poensis and B. vosseleri (Sibley and Monroe 1990, 1993) are retained as separate species contra Dowsett and Forbes-Watson (1993) who include vosseleri as a subspecies of B. poensis.
48 cm. Large, "eared" owl of forest. Heavily barred, richly-coloured upperparts. Pale underparts, heavily splotched on breast but finely barred on belly and flanks. Orange-brown eyes. Similar spp. Spotted Eagle-owl B. africanus is smaller, with white spotting on wing-coverts, white mantle-edging, and yellow eyes. Voice Series of low pop pop pop notes, rising and falling in crescendo and speed. Hints Forest and forest-edge.
Moreau, R. E. 1964. The re-discovery of an African owl Bubo vosseleri. Bulletin of the British Ornithologists' Club 84: 47-52.
Zimmerman, D. A.; Turner, D. A.; Pearson, D. J. 1996. Birds of Kenya and northern Tanzania. Helm, London.
Evans, T. D. 1997. Records of birds from the forests of the East Usambara lowlands, Tanzania, August 1994 - February 1995. Scopus 19: 92-108.
Hunter, N.; Carter, C.; Mlungu, E. 1998. A new location for the Usambara Eagle Owl Bubo vosseleri. Scopus 20: 52-53.
Cordeiro, N. J. 1998. A preliminary survey of the montane avifauna of Mt Nilo, East Usambaras, Tanzania. Scopus 20: 1-18.
Buckley, P.; Matilya, J. G. 1998. Saving Tanzania's mountain forests. World Birdwatch 20: 16-19.
Barnes, J.; Barnes, R.; Burston, P.; Githiru, M.; Leckie, J.; Mulwa, R.; Pilgrim, J. 1999. Project Kasigau '98.
Seddon, N.; Ekstrom, J. M. M.; Capper, D. R.; Isherwood, I. S.; Muna, R.; Pople, R. G.; Tarimo, E.; Timothy, J. 1999. Notes on the ecology and conservation status of key bird species in Nilo and Nguu North Forest Reserves, Tanzania. Bird Conservation International 9: 9-28.
Further web sources of information
View photos and videos, and hear sounds of this species from the Internet Bird Collection
Text account compilers
Ekstrom, J., Evans, M., Shutes, S., Starkey, M., Symes, A., Taylor, J.
Burgess, N., Butynski, T., Fjeldså, J., Moyer, D., Mulungu, E., Romdal, T.
IUCN Red List evaluators
Butchart, S., Taylor, J.
BirdLife International (2013) Species factsheet: Bubo vosseleri. Downloaded from http://www.birdlife.org on 23/05/2013. Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 23/05/2013.
This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.
To provide new information to update this factsheet or to correct any errors, please email BirdLife
To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.
Additional resources for this species
|Current IUCN Red List category||Vulnerable|
|Species name author||Reichenow, 1908|
|Population size||1500-7000 mature individuals|
|Distribution size (breeding/resident)||19,600 km2|
|Links to further information|
- Additional Information on this species|
- Climate change species distributions